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* Qualcomm Technologies, Inc. MSM Camera VFE
Camera VFE device provides the definitions for enabling
the VFE hardware. It also provides the functions for the client
to control the VFE hardware.
=======================
Required Node Structure
=======================
The VFE device is described in one level of the device node.
======================================
First Level Node - CAM VFE device
======================================
Required properties:
- compatible
Usage: required
Value type: <string>
Definition: Should specify the compatibility string for matching the
driver. e.g. "qcom,vfe480", "qcom,vfe175", "qcom,vfe170", "qcom,vfe175_130",
"qcom,vfe-lite480", "qcom,vfe-lite175", "qcom,vfe-lite175_130", "qcom,vfe-lite170".
- cell-index
Usage: required
Value type: <u32>
Definition: Should specify the hardware index id.
- reg-names
Usage: required
Value type: <string>
Definition: Should specify the name of the register block.
- reg
Usage: required
Value type: <u32>
Definition: Register values.
- interrupt-names
Usage: Required
Value type: <string>
Definition: Name of the interrupt.
- interrupts
Usage: Required
Value type: <u32>
Definition: Interrupt associated with VFE HW.
- regulator-names
Usage: required
Value type: <string>
Definition: Name of the regulator resources for VFE HW.
- xxxx-supply
Usage: required
Value type: <phandle>
Definition: Regulator reference corresponding to the names listed in
"regulator-names".
- clock-names
Usage: required
Value type: <string>
Definition: List of clock names required for VFE HW.
- clocks
Usage: required
Value type: <phandle>
Definition: List of clocks used for VFE HW.
- clock-rates
Usage: required
Value type: <u32>
Definition: List of clocks rates.
- src-clock-name
Usage: required
Value type: <string>
Definition: Source clock name.
Optional properties:
- clock-names-option
Usage: optional
Value type: <string>
Definition: Optional clock names.
- clocks-option
Usage: required if clock-names-option defined
Value type: <phandle>
Definition: List of optinal clocks used for VFE HW.
- clock-rates-option
Usage: required if clock-names-option defined
Value type: <u32>
Definition: List of clocks rates for optional clocks.
- clock-control-debugfs
Usage: optional
Value type: <string>
Definition: Enable/Disable clk rate control.
- qcom,cam-cx-ipeak:
Usage: optional
Value type: <phandle bit>
phandle - phandle of CX Ipeak device node
bit - Every bit corresponds to a client of CX Ipeak
Definition: CX Ipeak is a mitigation scheme which throttles camera frequency
if all the clients are running at their respective threshold
frequencies to limit CX peak current.
driver in the relevant register.
- scl-clk-names:
Usage: optional
Value type: <string>
Definition: Scalable clock names to identify which clocks needs to update
along with source clock.
Example:
qcom,vfe0@acaf000 {
cell-index = <0>;
compatible = "qcom,vfe480";
reg-names = "ife";
reg = <0xacaf000 0x4000>;
interrupts = <0 465 0>;
interrupt-names = "ife";
vdd-names = "camss-vdd", "ife0-vdd";
camss-vdd-supply = <&titan_top_gdsc>;
ife0-vdd-supply = <&ife_0_gdsc>;
clock-names = "soc_ahb_clk",
"cpas_ahb_clk",
"slow_ahb_clk_src",
"ife_clk",
"ife_clk_src",
"ife_csid_clk",
"ife_csid_clk_src",
"camnoc_axi_clk",
"ife_axi_clk",
clocks = <&clock_camcc CAM_CC_SOC_AHB_CLK>,
<&clock_camcc CAM_CC_CPAS_AHB_CLK>,
<&clock_camcc CAM_CC_SLOW_AHB_CLK_SRC>,
<&clock_camcc CAM_CC_IFE_0_CLK>,
<&clock_camcc CAM_CC_IFE_0_CLK_SRC>,
<&clock_camcc CAM_CC_IFE_0_CSID_CLK>,
<&clock_camcc CAM_CC_IFE_0_CSID_CLK_SRC>,
<&clock_camcc CAM_CC_CAMNOC_AXI_CLK>,
<&clock_camcc CAM_CC_IFE_0_AXI_CLK>,
clock-rates = <0 0 80000000 0 320000000 0 384000000 0 0 0>;
src-clock-name = "ife_clk_src";
clock-names-option = "ife_dsp_clk";
clocks-option = <&clock_camcc CAM_CC_IFE_0_DSP_CLK>;
clock-rates-option = <600000000>;
scl-clk-en;
scl-clk-names = "ife_axi_clk";
qcom,cam-cx-ipeak = <&cx_ipeak_lm 2>;
status = "ok";
};
|
